Effect of cellulose-lignin interactions on char structural changes during fast pyrolysis at 100-350 °c
This study investigates the cellulose-lignin interactions during fast pyrolysis at 100-350°C for better understanding fundamental pyrolysis mechanism of lignocellulosic biomass. The results show that co-pyrolysis of cellulose and lignin (with a mass ratio of 1:1) at temperatures < 300 °C leads to...
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| Format: | Journal Article |
| Language: | English |
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ELSEVIER SCIENCE INC
2021
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| Online Access: | http://purl.org/au-research/grants/arc/DE130101215 http://hdl.handle.net/20.500.11937/91482 |
| _version_ | 1848765526387458048 |
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| author | Chua, Y.W. Wu, Hongwei Yu, Yun |
| author_facet | Chua, Y.W. Wu, Hongwei Yu, Yun |
| author_sort | Chua, Y.W. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | This study investigates the cellulose-lignin interactions during fast pyrolysis at 100-350°C for better understanding fundamental pyrolysis mechanism of lignocellulosic biomass. The results show that co-pyrolysis of cellulose and lignin (with a mass ratio of 1:1) at temperatures < 300 °C leads to a char yield lower than the calculated char yield based on the addition of individual cellulose and lignin pyrolysis. The difference between the experimental and calculated char yields increases with temperature, from ∼2% 150 °C to ∼6% at 250 °C. Such differences in char yields provide direct evidences on the existence of cellulose-lignin interactions during co-pyrolysis of cellulose and lignin. At temperatures below 300 °C, the reductions in both lignin functional groups and sugar structures within the char indicate that co-pyrolysis of cellulose and lignin enhances the release of volatiles from both cellulose and lignin. Such an observation could be attributed to two possible reasons: (1) the stabilization of lignin-derived reactive species by cellulose-derived reaction intermediates as hydrogen donors, and (2) the thermal ejection of cellulose-derived species due to micro-explosion of liquid intermediates from lignin. In contrast, at temperatures ≥ 300 °C, co-pyrolysis of cellulose and lignin increases char yields, i.e., with the difference between the experimental and calculated char yields increasing from ∼1% at 300 °C to ∼8% at 350 °C. The results indicate that the cellulose-derived volatiles are difficult to diffuse through the lignin-derived liquid intermediates into the vapor phase, leading to increased char formation from co-pyrolysis of cellulose and lignin as temperature increases. Such an observation is further supported by the increased retention of cellulose functional groups in the char from co-pyrolysis of cellulose and lignin. |
| first_indexed | 2025-11-14T11:36:39Z |
| format | Journal Article |
| id | curtin-20.500.11937-91482 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-14T11:36:39Z |
| publishDate | 2021 |
| publisher | ELSEVIER SCIENCE INC |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-914822023-05-04T07:33:38Z Effect of cellulose-lignin interactions on char structural changes during fast pyrolysis at 100-350 °c Chua, Y.W. Wu, Hongwei Yu, Yun Science & Technology Physical Sciences Technology Thermodynamics Energy & Fuels Engineering, Chemical Engineering, Mechanical Engineering Cellulose Lignin Co-pyrolysis Char structure Cellulose?lignin interactions BIOMASS PYROLYSIS HEMICELLULOSE WOOD BEHAVIOR SLOW This study investigates the cellulose-lignin interactions during fast pyrolysis at 100-350°C for better understanding fundamental pyrolysis mechanism of lignocellulosic biomass. The results show that co-pyrolysis of cellulose and lignin (with a mass ratio of 1:1) at temperatures < 300 °C leads to a char yield lower than the calculated char yield based on the addition of individual cellulose and lignin pyrolysis. The difference between the experimental and calculated char yields increases with temperature, from ∼2% 150 °C to ∼6% at 250 °C. Such differences in char yields provide direct evidences on the existence of cellulose-lignin interactions during co-pyrolysis of cellulose and lignin. At temperatures below 300 °C, the reductions in both lignin functional groups and sugar structures within the char indicate that co-pyrolysis of cellulose and lignin enhances the release of volatiles from both cellulose and lignin. Such an observation could be attributed to two possible reasons: (1) the stabilization of lignin-derived reactive species by cellulose-derived reaction intermediates as hydrogen donors, and (2) the thermal ejection of cellulose-derived species due to micro-explosion of liquid intermediates from lignin. In contrast, at temperatures ≥ 300 °C, co-pyrolysis of cellulose and lignin increases char yields, i.e., with the difference between the experimental and calculated char yields increasing from ∼1% at 300 °C to ∼8% at 350 °C. The results indicate that the cellulose-derived volatiles are difficult to diffuse through the lignin-derived liquid intermediates into the vapor phase, leading to increased char formation from co-pyrolysis of cellulose and lignin as temperature increases. Such an observation is further supported by the increased retention of cellulose functional groups in the char from co-pyrolysis of cellulose and lignin. 2021 Journal Article http://hdl.handle.net/20.500.11937/91482 10.1016/j.proci.2020.08.014 English http://purl.org/au-research/grants/arc/DE130101215 ELSEVIER SCIENCE INC fulltext |
| spellingShingle | Science & Technology Physical Sciences Technology Thermodynamics Energy & Fuels Engineering, Chemical Engineering, Mechanical Engineering Cellulose Lignin Co-pyrolysis Char structure Cellulose?lignin interactions BIOMASS PYROLYSIS HEMICELLULOSE WOOD BEHAVIOR SLOW Chua, Y.W. Wu, Hongwei Yu, Yun Effect of cellulose-lignin interactions on char structural changes during fast pyrolysis at 100-350 °c |
| title | Effect of cellulose-lignin interactions on char structural changes during fast pyrolysis at 100-350 °c |
| title_full | Effect of cellulose-lignin interactions on char structural changes during fast pyrolysis at 100-350 °c |
| title_fullStr | Effect of cellulose-lignin interactions on char structural changes during fast pyrolysis at 100-350 °c |
| title_full_unstemmed | Effect of cellulose-lignin interactions on char structural changes during fast pyrolysis at 100-350 °c |
| title_short | Effect of cellulose-lignin interactions on char structural changes during fast pyrolysis at 100-350 °c |
| title_sort | effect of cellulose-lignin interactions on char structural changes during fast pyrolysis at 100-350 °c |
| topic | Science & Technology Physical Sciences Technology Thermodynamics Energy & Fuels Engineering, Chemical Engineering, Mechanical Engineering Cellulose Lignin Co-pyrolysis Char structure Cellulose?lignin interactions BIOMASS PYROLYSIS HEMICELLULOSE WOOD BEHAVIOR SLOW |
| url | http://purl.org/au-research/grants/arc/DE130101215 http://hdl.handle.net/20.500.11937/91482 |